periods & groups
What way does a period go
Horizontal
Elements on the left side of the staircase are all solids, true or false?
False
What is one category in the metals group?
-lanthanides
-actinides
-alkali earth
-alkali
-transition
-poor/other
What is one type of a non metal?
Noble gas
Halogens
Other nonmetals
One way to organize the periodic table by___________.
The elements protons
What way does a group go?
Vertical
What is an element?
A basic substance that cannot be broken down and only is only made of one type of atom
What side of the staircase if metals on?
The left side
What side of the staircase is non metals on?
The right side
The periodic table is organized by__________.
Chemical properties
What do elements have in common when in a group?
Chemical properties
Which of these are an element?
A). wood
B).water
C). air
D). all of the above
D). All of the above
Is silver(Ag) a metal? If so what kind of metal is it?
Yes
Transition metal
Is Krypot (Kr) a nonmetal if so what category is it in?
Yes
Noble gas
What are three particles in a atom?
-protons
-electrons
-neutrons
How many shells can a group have?
8
How many elements are human-made?
About 30 elements are human-made
Name one metal in the first group
Lithium, sodium, potassium, rubidium, cesium, francium
Name one nonmetal in the second period
Boron, carbon, nitrogen, oxygen, fluorine, and neon
What are 2 things in a symbol?
1). Atomic mass
2). Atomic number
How many shells can a period have?
7
name ten things that are made up of elements
-everything
Which of the following is a metal?
Silver
Oxygen
Boron
Silver
If hydrogen is not a metal what is it?
Other/ poor nonmetal
How many elements occur naturally?
About 90 elements occur naturally.